Wire stitcher



f July 3, 1923.

J. WOhF ET AL WIRE STITCHER '2 Sheets-Sheeg 1 Filed Sept. 13 1919 July 3, 1923.

J. WOLF ET AL WIRE STITCHER Fil'ed Sept. 15, 1919 2 Sheets$heet 2- Patented July 3, 1923.

UNHTED stars iatosze earner r rfi caki JOHN WOLF, or CICERQ, AND ivmncri n BURGER, or cnioneoirttrnors, AssIonoRs, BY

MESNE nssrenmnnrs, T IDEAL srrronna a rare. 00., oscHIcAeo, rumors;

T 0 allwhom it may concern:

Be it known that we, JOHN "VVoLF and MARTIN BURGER, subjects of the Emperor of Austria, residingvat Cicero, in the county of Cook and State of Illinois,v and at Chicago, in the county of-Cook and State oflllinois, respectively, have invented a certain new and useful Improvement in Wire Stitchers, of which the following is a'full clear, conelse, and exact description, reference being had to the accompanying drawings, forming a part of this specification;

Our invention relates to wire stitchers and has to do more particularly with feed mechanism therefor, an object being to provide an improved and simplified rotary feed mechanism eliminating the objectionable reciprocating driving parts heretofore employed. 1 One of the features of our invention'is the provision of feed mechanism having continually rotating rollers "provided with peripheral portion adapted'to engage and feed the wire to a predetermined extentduring the rotary movement of thefeed rollers. Y

1 Fora better understanding of our inven 'tion reference isto be had to the accompanying drawingsin which Fig; 1 is a front view of the'head ofa well known form of wire stitcher having our im roved feed mechanism applied thereto; ig.- 2 is a'sectional view along the line 2 2"ofFig, 1 through the lower feed roller and showing the" check pawl mechanism; Fig.- 3 shows a portion-of the face plate with the feed roller mechanism and the adjustable cap removed from the lower feed roller;

-' Fig. 1 isa top View of thelower feed roller showin the clearance on the periphery there- 13 of; and I I v Fig. 5 is adetail view of the feed pawl.

Referring now more in detail to our inven tion asshownherein; it is illustrated in connection with a well known'form of wire stitoher comprising 'a faceplate 10 carrying a cam 11 connected-by means of a link 12 to a driver 13 and by means of a roller 14 to, a former "15.- The former'and driver-are supported in a box 16 and cooperate with an anvill'Z which is supported in a well known way so as to reciprocate" forwardly and backwardly; .A'cutterbox 18 is adjustably 'supp'orted by the face plate 10, being movableJoy means of a hand wheel 19 in a well WIRE sri'ronnn.

Application filed September 13, 1919.- Serial No. 323,658.

known manner. A wire guide 20 is alsoioaliried by thecutter box 18 through which the wire 21 is fed. I

Now as to the feed mechanism, this comprises preferably a-pair of feed rollers con- I sisting of an upper straight facedfeed roll 22 and a lower feedroll 23, said rollers be, ing connectedby gears 24:, 25- thev driving, power coming from the main shaft through gears'26 27 and 28, gear 27 acting as an idler and gear 28 being supported upon-the main shaft 29. The gear ratio is preferably such that for each complete reciprocation of V the former and fdriver one revolution of. the feed rollers is effected, althoughyof course, it will beapparent that other proportions may be employed if desired.

In order to effect an intermittent feed ing of the wire 21 we-preferably providea yielding feed pawl 30 pivotally supported, upon a pin 31 carried by the lower feedroll 23. Aspring 32 acts'to press the feed pawl.

30 outwardly but its movement islimit'ed'by engagement with the-feed roller 28atpoint 23. This feed pawl 30 is preferably so adjusted that its feed surface during the feeding portion of the revolution, presses the wire 21 into intimate contactwith the upper feed roller 22,'the, combined. rotation ofthe two, thus feeding the wire '21 into. the stapling mechanism. Roll 23 has its? peripheral face cut awayat 23 to insure clearing the wire duringthe non-feeding period.

In-the form of our invention herein we employ a feed pawl3O having a feed face of a lengthsuflicient toifeed wire loong enough for the largest staple and as illustrated then'provide adjustable feedcontrol means i so that the length of wire fed may be varied according tothe size of a staple wanted- To this end we provide a sizing roller 33 supported upon a plate 3 1' adjustably carried upon the front end of the lower feed roll shaft 35, the said plateSl being locked by means of'a nut 36 threaded upon the shaf-t adjusted'upon the shaft 35 thereby'moving the sizing'roller33 to the rightor left,

of the feed pawl 30 leaves thesizing-rollerg..

85but permitting free rotation of feed roll 23. This, plate 34 may thus be --rotatahly:

Q I 1,4e0,52e

33, the feed pawl is permitted to snap out wa-rdly and engage the wire 21 so as to start the feeding operation thereof. That is. so long as the feed pawl 30 is rotating in en gagement with the sizing roller 33, its feed face is held feed-clear of the wire 21. But as soon as it clears the sizing-roller 33 it snaps into feeding engagement with the wire 21 by pressing it against the opposite roller 22. It will thus be apparent that although a single feed pawl 30 is employed, by means of the adjustable sizing roller 33 the release of pawl 30 may be varied so as to feed various lengths of wire 21. It will, of course, be readily seen that although we provide an adjustable feed pawl 30, we may also use a plurality of different sizes of feedpawls whose feeding surfaces are according to the different lengths of the wire to be fed. Thus the size of the staple is determined by the length of the feed face on the feed pawl 30 instead of by the time of release as illustrated herein.

In order to securely hold the wire during the operation of the machine we also provide the usual check pawl 38. guide and. wire straightener 39, the form shown being well known.

Now as to the operation, the cutter box 18 is adjusted relative to the anvil 1? and former 15 by means of the hand wheel 19 in a well known manner so as to secure a balanced staple, that is a staple having equal legs, this being done during the adjusting operation either before or after the proper feed length has been determined The sizing-roller 33 is also adjusted by loosening the lock nut 36 and moving the plate 34 so that the rear edge 30 of the feed pawl will free itself from the sizing roller 33 to press the wire 21 against the opposite feed roller 22 at the proper time. The lock nut is then tightened up again. Thus by means of the connecting gears 24., 25, 26, 27, and 28, feed rollers 22 and 23 are given one revolution for each complete reciprocation of the stapling mechanism, and although the feed rollers 22-23 are rotating continually during the operation of the stitcher, feeding contact between the two feed rollers 22-23 and the wire 21 is not effected except during the time the feed pawl 30 is pressing the wire 21 against the opposite feed roll 22. The length of this feeding operation is, of course, determined by the adjustment of the sizing roller 33. Thus any size staple may be fed within the limit of operation of the machine.

The driving mechanism for the stitcher is not shown but this may be applied as de sired, the machine shown being driven from the main shaft 29 which usually extends rearwardly and carries a pulley and clutch controlled from a foot treadle at the base of the stand ordinarily provided. It will, of

course, be understood that the usual clinchers and table are provided beneath the head but this has not been shown as their operation is well understood.

Although in illustrating our invention we have chosen a preferred form we donot desire to be limited tothe matter shown and described as changes and modifications will readily occur to those skilled in the art and we aim to cover all such changes and modifications as come within the spirit and scope of the appended claims.

lVhat we claim as new and desire to secure by Letters Patent is:

1. In a wire stitcher, wire feed mechanism comprising a pair of continually .ro-

tating feed rollers having opposed peripheral feed edges bet-ween which the wire is fed, with means for effecting an intermittent feeding of the wire by said rollers, said means including a metallic yieldingly mounted peripheral edge of one of ,the rollers.

2. In a wire stitcher, wire feed mechanism comprising a pair of continually rotating feed rollers having opposed peripheral feed edges between which the wire is 1" fed, with means for effecting an intermittent feeding of the wire by said rollers, said rollers being mounted upon relatively fixed shafts, and relatively stationary means mounted independent .of the rollers and acting upon the rollers for varying the feeding period.

3. In a wire stitcher, wire feed mecha. nism comprising a pair of continually rotating feed rollers having opposed peripheral feed edges between which the wire is fed, with. means for efiectingan intermittent feeding of the wire by said rollers, said means including a yielding peripheral edge of one of the rollers, and means for varying the feeding period. i

4-. A'wire feed roller for wire stitchers having a yieldingly mounted metallic feed section for yieldingly engaging the wire with a peripheral feeding surface the feed engaging length of which determines the amount of wire fed.

5. Feed mechanism for wire, stichers comprising a feed roller having a yieldingly mounted metallic feed section, and means for varying the feeding period of the feed section.

6. Feed mechanism for wire stitchers comprising a continually rotating fixed axis feed roller having a peripheral feeding edge,.a'nd

relatively stationary means mounted inde pendent of the roller and co-operative there with for varying the feeding period of the feed roller.

7. Feed mechanism for wire stitchers com: prising a continually rotating feed roller, and an automatically controlled metallic feed pawl carried by the roller for effecting an intermittent feed.

8. Feed mechanism for wire stitchers comprising a pair of continually rotating relatively fixed axis opposed rollers provided with peripheral feed edges, and means cooperative With the rollers for effecting feeding contact of the rollers during a portion of each revolution.

9. A wire stitcher comprising driving mechanism including a rotatable driving shaft, and feed mechanism including a pair of feed rollers, driving means connecting the rotatable shaft to the feed rollers for effecting a continual constant rotation thereof, a metallic feed pawl carried by one of the rollers, and a relatively stationary adjustable stop for varying the feeding period of the feed pawl. I

10. A wire stitcher comprising driving mechanism including a rotatable driving shaft, and feed mechanism including a pair of feed rollers, driving means connecting the rotatable shaft to the feed rollers for effecting a continual constant rotation thereof, a pivoted peripheral edge portion carried by-one of the rollers, and a relatively stationary adjustable stop for varying the feeding period of the pivoted peripheral edge portion.

11. In a wire stitcher, a wire feed mechanism including a pair of'connected continuously rotatable feed rollers having contiguous peripheral edges between which the Wire nism including a pair of connected continual ously rotatable feed rollers havingcontigu ous peripheral edges between which the wire is fed, one of said rollers having a peripheral section movably mounted in a cut-awayv portion of the roller, and a spring for pressing said section outwardly so as to press'the eral edge of the other roller so as to feed the same, and a circularly adjustable stop mounted stationary relativeto-the sectionroller .for determining the wire feeding period thereof.

In witness whereof, we hereunto subscribe our names this 30th day of July, A.-D.,

' JOHN WOLF.

MARTIN BURGER.

wire into intimate contact with the periph- 

